作者toysrus (收.)
看板Statistics
标题Re: [问题]机率
时间Fri Jun 9 01:42:31 2006
※ 引述《stonycindy (Esperanza)》之铭言：
: Question：Two construction companies make bids of X and Y(in $100,000's) on
: a remodeling project. The joint p.d.f. of X and Y is uniform on the
: space 2<x<2.5, 2<y<2.3. If X and Y are within 0.1 of each other, the
: companies will be asked to rebid; otherwise the low bidder will be
: awarded the contract. What is the probability that they will be asked
: to rebid?
: 麻烦请写计算过程!
: 谢谢!
P（|X-Y|<0.1）=P(-0.1< X-Y <0.1)
=[(0.3*0.5)^-1][0.3*0.5-0.5*0.2*0.4-0.5*(0.1+0.4)*0.3]=0.2333
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